Davis WeatherLink for Alarm Output Add. Manual de usuario descargar pdf (Pagina 11)

•A True or False check is used for the Low Transmitter and Repeater

Battery Status parameters, which are not numeric. This check type can

also be used with the Bar Trend parameters.

• Trending allows you to determine whether a particular variable is

approaching a value of concern. It is like a “predictive” alarm. If the

number you enter in the first edit box is lower than the number you enter

in the second box, the data logger will check for an upward trend. Like-

wise, if the number in the first edit box is higher than the number you

enter i

n the second box, the data logger will check for a downward

trend. The third edit box is used to indicate the maximum period of time

that may elapse before this alarm is no longer valid.



For this type of alarm to be valid, the parameter of interest must pass

throug

h both thresholds within the specified time period. If the parame-

ter is between the thresholds when the alarm is set, or above the higher

threshold for an upward tr

end alarm or below the lower threshold for a

downward trend alarm, the alarm will not become active. Please note

that frequent communication with the data logger will cause the timing

function of this alarm type to run long.

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Davis WeatherLink for Alarm Output Add. Manual de usuario Pagina 11